CN217155593U

CN217155593U - Sample preposed optical system of spectrophotometer

Info

Publication number: CN217155593U
Application number: CN202123265241.3U
Authority: CN
Inventors: 韩明山; 向秋波; 梁玉婷; 李清华; 刘凤梅
Original assignee: Shanghai Metash Instruments Co ltd
Current assignee: Shanghai Metash Instruments Co ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-08-09
Anticipated expiration: 2031-12-23

Abstract

The utility model discloses a leading optical system of spectrophotometer's sample, including light source light path, spectral light path, signal light path and the sample cell that awaits measuring, the light source light path is including the light source lamp that is used for sending light, the light process of light source lamp get into after the spectral light path is handled the signal light path, the sample cell that awaits measuring is located in the light source light path. The utility model discloses a to await measuring the sample cell leading, improved energy utilization efficiency, effectively avoided the not enough problem of receiving terminal energy, reduce lens and speculum quantity that use in the light path, optimized the light path structure, saved the material and the manufacturing cost of instrument greatly, the structure of instrument can be retrencied, has reduced the instrument volume, and weight also can alleviate in the production process of instrument, the debug time shortens, makes production efficiency increase substantially.

Description

Sample preposed optical system of spectrophotometer

Technical Field

The utility model relates to a spectral instrument technical field specifically is a leading optical system of sample of spectrophotometer.

Background

The visible spectrophotometer can perform qualitative and quantitative analysis on sample substances in the near ultraviolet-visible spectrum region, is one of spectrum analysis instruments commonly used in physicochemical laboratories, adopts an advanced blazed grating monochromator, has the advantages of high wavelength precision, good monochromaticity, low stray light and the like, adopts a microcomputer measurement system, has high tau-A conversion precision, and has the functions of automatically adjusting 0 percent and 100 percent, setting concentration factors, directly reading concentration and selecting a serial data printer to perform data printing. The method is widely applied to departments of medicine and health, clinical examination, biochemistry, petrochemical industry, environmental protection, quality control and the like.

The basic working principle of a spectrophotometer is that substances in a solution generate an absorption effect on light under the excitation of light irradiation, and the substances have selectivity on the absorption of the light. Various substances have their respective absorption spectra, so that when a monochromatic light passes through a solution, its energy is absorbed and weakened, the degree of weakening of the light energy and the concentration of the substance have a certain proportional relationship, and a spectrophotometer analyzes the substance components by comparing the light intensities of a sample to be analyzed and a standard sample by using the principle.

In the prior art, in order to maintain the detection precision of a spectrophotometer, the number of parts is very large, for example, lenses are too many, the structural design is complex, so that the problem that the energy which can be effectively received by a receiving end is weak is caused, and the complex structural design often causes the instrument to have large volume, heavy weight, increased manufacturing cost and long debugging time in the using process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a spectrophotometer's leading optical system of sample, including light source light path, spectral light path, signal light path and the sample cell that awaits measuring, the light source light path is including the light source lamp that is used for sending light, the light process of light source lamp get into after the spectral light path is handled the signal light path, the sample cell that awaits measuring is located in the light source light path.

Preferably, the light source circuit further includes an incident lens and an incident slit, the sample cell to be measured is disposed between the incident lens and the incident slit, and light emitted from the light source lamp is focused by the incident lens and then passes through the sample cell to be measured to be imaged on the incident slit.

Preferably, the light splitting optical path comprises a first reflector, a second reflector and a grating, and light emitted by the light source optical path sequentially passes through the first reflector and the second reflector and then is refracted by the grating and enters the signal optical path through the second reflector.

Preferably, the signal light path includes an exit slit, an exit lens and a receiver, and the light refracted by the second reflecting mirror passes through the exit slit and then enters the receiver through the exit lens.

Preferably, the light source lamp is a deuterium lamp or a tungsten lamp.

Preferably, the first reflecting mirror is a plane mirror, and the second reflecting mirror is a collimating mirror.

Preferably, the receiver is a photocell or photomultiplier tube.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a to await measuring the sample cell leading, improved energy utilization efficiency, effectively avoided the not enough problem of receiving terminal energy, reduce lens and speculum quantity that use in the light path, optimized the light path structure, saved the material and the manufacturing cost of instrument greatly, the structure of instrument can be retrencied, has reduced the instrument volume, and weight also can alleviate in the production process of instrument, the debug time shortens, makes production efficiency increase substantially.

Drawings

Fig. 1 is a schematic structural view of a specific embodiment of the present invention.

In the figure: 100. a light source circuit; 110. a light source lamp; 120. an incident lens; 130. an entrance slit; 200. a light splitting optical path; 210. a first reflector; 220. a second reflector; 230. a grating; 300. a signal light path; 310. an exit slit; 320. an exit lens; 330. a receiver; 400. and (5) a sample pool to be tested.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: the utility model provides a sample leading optical system of spectrophotometer, this system has simplified the light path structure for the optical imaging effect is more clear, the imaging process is simpler, and it is simple to change the light source, and debugging procedure and method have also been simplified when saving the cost, and whole light path system compact structure is particularly useful for small-size desktop instrument or hand-held type equipment.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a leading optical system of spectrophotometer's sample, includes light source light path 100, beam split light path 200, signal light path 300 and sample cell 400 that awaits measuring, light source light path 100 launches light and passes through beam split light path 200, signal light path 300 in proper order, and sample cell 400 that will await measuring locates in the light source light path 100, and is different with prior art, the utility model discloses with sample cell 400 that awaits measuring leading, the change that can guarantee external environment light does not have the influence to the test result, and this characteristics have decided this optical system can design into open sample frame structure, and convenience of customers uses, and the instrument test index also more is difficult to receive external influence.

The present invention will be further explained with reference to the drawings and examples.

In a specific embodiment of the utility model, as shown in fig. 1, optical system includes light source light path 100, beam split light path 200, signal light path 300 and sample cell 400 that awaits measuring, and light source light path 100 is including the light source lamp 110 that is used for sending light, and the light of light source lamp 110 gets into signal light path 300 after beam split light path 200 handles, and sample cell 400 that awaits measuring is located in light source light path 100.

Specifically, the light source optical path 100 further includes an incident lens 120 and an incident slit 130, the sample cell 400 to be measured is disposed between the incident lens 120 and the incident slit 130, and the light emitted from the light source 110 is focused by the incident lens 120 and then passes through the sample cell 400 to be measured to be imaged on the incident slit 130. Further, according to the requirement of actual detection work, the light source lamp 110 can be replaced by a deuterium lamp or a tungsten lamp, and the light source lamp 110 arranged in the rear part of the device is convenient to replace.

Specifically, the light splitting optical path 200 includes a first reflecting mirror 210, a second reflecting mirror 220 and a grating 230, light of the light source optical path 100 is emitted from the incident slit 130, the light entering the first reflecting mirror 210 is projected to the second reflecting mirror 220, the second reflecting mirror 220 projects the light to the grating 230, the grating 230 adopts a reflection grating, the grating 230 reflects the light to the second reflecting mirror 220, so far, the light passes through the second reflecting mirror 220 twice, the number of optical components is reduced, the cost is saved, meanwhile, debugging procedures and methods are simplified, and the whole optical path system is compact in structure. The second reflecting mirror 220 projects the light to the signal light path 300. Further, the first reflecting mirror 210 is a plane mirror, and the second reflecting mirror 220 is a collimating mirror.

Specifically, the signal optical path 300 includes an exit slit 310, an exit lens 320 and a receiver 330, and the light refracted by the second reflecting mirror 220 passes through the exit slit 310 and then enters the receiver 330 through the exit lens 320. Further, the receiver 330 is a photocell or photomultiplier tube.

The utility model discloses in another specific implementation, optical system includes light source light path 100, beam split light path 200, signal light path 300 and sample cell 400 that awaits measuring, light source light path 100 includes light source lamp 110, incident lens 120 and incident slit 130, sample cell 400 that awaits measuring is located in light source light path 100, beam split light path 200 includes first speculum 210 and second speculum 220, signal light path 300 is thrown into by second speculum 220 again after light projects second speculum 220 through first speculum 210, signal light path 300 includes emergent slit 310, emergent lens 320 and receiver 330.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a preceding optical system of sample of spectrophotometer, includes light source light path (100), split light path (200), signal light path (300) and sample cell (400) that await measuring, its characterized in that: light source light path (100) is including light source lamp (110) that is used for emitting light, the light process of light source lamp (110) get into after beam split light path (200) are handled signal light path (300), sample cell (400) that awaits measuring are located in light source light path (100).

2. The specimen-mounted optical system of a spectrophotometer according to claim 1, wherein: the light source circuit (100) further comprises an incident lens (120) and an incident slit (130), the sample cell (400) to be measured is arranged between the incident lens (120) and the incident slit (130), and light rays emitted by the light source lamp (110) are focused by the incident lens (120) and then penetrate through the sample cell (400) to be measured to be imaged on the incident slit (130).

3. The specimen-mounted optical system of a spectrophotometer according to claim 1, wherein: light splitting light path (200) include first speculum (210), second speculum (220) and grating (230), the light that light source light path (100) jetted out passes through first speculum (210) and second speculum (220) back in proper order, by grating (230) refraction warp second speculum (220) get into signal light path (300).

4. The specimen-mounted optical system of a spectrophotometer according to claim 3, wherein: the signal light path (300) comprises an exit slit (310), an exit lens (320) and a receiver (330), and the light refracted by the second reflecting mirror (220) passes through the exit slit (310) and then enters the receiver (330) through the exit lens (320).

5. The specimen-mounted optical system of a spectrophotometer according to claim 1, wherein: the light source lamp (110) is a deuterium lamp or a tungsten lamp.

6. The specimen-mounted optical system of a spectrophotometer according to claim 3, wherein: the first reflecting mirror (210) is a plane mirror, and the second reflecting mirror (220) is a collimating mirror.

7. The specimen-mounted optical system of a spectrophotometer according to claim 4, wherein: the receiver (330) is a photocell or photomultiplier tube.